Administrator Guide

● Members can have different Link MTU values. Tagged members must have a link MTU 4 bytes higher
than untagged members to account for the packet tag.
● The VLAN link MTU and IP MTU must be less than or equal to the link MTU and IP MTU values
configured on the VLAN members. For example, the VLAN contains tagged members with Link MTU
of 1522 and IP MTU of 1500 and untagged members with Link MTU of 1518 and IP MTU of 1500. The
VLAN’s Link MTU cannot be higher than 1518 bytes and its IP MTU cannot be higher than 1500 bytes.
The following shows the difference between Link MTU and IP MTU.
Layer 2
Overhead
Link MTU and IP MTU Delta
Ethernet
(untagged)
18 bytes
VLAN Tag 22 bytes
Untagged Packet
with VLAN-Stack
Header
22 bytes
Tagged Packet
with VLAN-Stack
Header
26 bytes
name
Assign a name to the Default VLAN.
Syntax
namevlan-name
To remove the name from the VLAN, use the no name command.
Parameters
vlan-name Enter up to 32 characters as the name of the VLAN.
Defaults Not configured.
Command Modes INTERFACE VLAN
Supported Modes All Modes
Command
History
Version Description
9.4(0.0) Supported on the FN I/O Aggregator.
8.3.17.0 Supported on the M I/O Aggregator.
Usage
Information
This CLI applies only to the Default VLAN.
To display information about a named VLAN, enter the show vlan command with the name parameter
or the show interfaces description command.
Related
commands
default vlan-id —Assigns a descriptive text string to the interface.
interface vlan — Configures a VLAN.
show vlan — Displays the current VLAN configurations on the switch.
negotiation auto
Enable auto-negotiation on an interface.
Syntax
negotiation auto
To disable auto-negotiation, enter no negotiation auto command.
178 Interfaces